/*
 * Copyright � 2002-2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

using Spring.Core.TypeResolution;
using Spring.Util;

namespace Spring.Objects.Factory.Support;

/// <summary>
/// Default implementation of the
/// <see cref="IObjectDefinitionFactory"/>
/// interface.
/// </summary>
/// <remarks>
/// <p>
/// Does <b>not</b> support per <see cref="System.AppDomain"/>
/// <see cref="System.Type"/> loading.
/// </p>
/// </remarks>
/// <author>Aleksandar Seovic</author>
[Serializable]
public class DefaultObjectDefinitionFactory : IObjectDefinitionFactory
{
    /// <summary>
    /// Factory style method for getting concrete
    /// <see cref="IConfigurableObjectDefinition"/>
    /// instances.
    /// </summary>
    /// /// <remarks>If no parent is specified, a RootObjectDefinition is created, otherwise a
    /// ChildObjectDefinition.</remarks>
    /// <param name="typeName">The <see cref="System.Type"/> of the defined object.</param>
    /// <param name="parent">The name of the parent object definition (if any).</param>
    /// <param name="domain">The <see cref="System.AppDomain"/> against which any class names
    /// will be resolved into <see cref="System.Type"/> instances.</param>
    /// <returns>
    /// An
    /// <see cref="IConfigurableObjectDefinition"/>
    /// instance.
    /// </returns>
    public virtual AbstractObjectDefinition CreateObjectDefinition(string typeName, string parent, AppDomain domain)
    {
        Type objectType = null;
        if (StringUtils.HasText(typeName) && domain != null)
        {
            try
            {
                objectType = TypeResolutionUtils.ResolveType(typeName);
            }
            // try later....
            catch { }
        }

        if (StringUtils.IsNullOrEmpty(parent))
        {
            if (objectType != null)
            {
                return new RootObjectDefinition(objectType);
            }
            else
            {
                RootObjectDefinition rootObjectDefinition = new RootObjectDefinition();
                rootObjectDefinition.ObjectTypeName = typeName;
                return rootObjectDefinition;
            }
        }
        else
        {
            if (objectType != null)
            {
                ChildObjectDefinition childObjectDefinition = new ChildObjectDefinition(parent);
                childObjectDefinition.ObjectType = objectType;
                return childObjectDefinition;
            }
            else
            {
                ChildObjectDefinition childObjectDefinition = new ChildObjectDefinition(parent);
                childObjectDefinition.ObjectTypeName = typeName;
                return childObjectDefinition;
            }
        }
    }
}
